Base rate of debt instrument.

No definition available.

Name:	crmt_DebtInstrumentBaseRate
Namespace Prefix:	crmt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Additional borrowing capacity of line of credit facility with an accordion feature.

+ References

No definition available.

+ Details

Name:	crmt_LineOfCreditFacilityAdditionalBorrowingCapacityAccordionFeature
Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the minimum amount available to draw under a credit facility that must be maintained.

+ References

No definition available.

+ Details

Name:	crmt_LineOfCreditFacilityMinimumRequiredAvailableDrawAmount
Namespace Prefix:	crmt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Minimum percent of pool balance.

+ References

No definition available.

+ Details

Name:	crmt_MinimumPercentOfPoolBalance
Namespace Prefix:	crmt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of a note payable classified as recourse.

+ References

No definition available.

+ Details

Name:	crmt_NotesPayablePercentageOfNoteClassifiedAsRecourse
Namespace Prefix:	crmt_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478546/942-210-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 470
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481139/470-20-50-4

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19)(b))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from a borrowing supported by a written promise to pay an obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromNotesPayable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=crmt_NotesPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=crmt_WarehouseFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_SecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=crmt_BmoHarrisBankMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
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Note F - Debt Facilities (Details Textual) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
	Jul. 12, 2024	Oct. 31, 2024	Oct. 31, 2024	Oct. 31, 2023	Sep. 16, 2024	Sep. 15, 2024
Proceeds from Notes Payable			$ 449,889	$ 360,340
Notes Payable [Member]
Minimum Percent of Pool Balance		2.00%	2.00%
Revolving Credit Facility [Member]
Line of Credit Facility, Additional Borrowing Capacity, Accordion Feature		$ 97,000	$ 97,000
Warehouse Facility [Member]
Proceeds from Notes Payable	$ 150,000	150,000
Notes Payable, Percentage of Note Classified as Recourse	10.00%
Long-Term Debt, Gross		0	0
Warehouse Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.50%
BMO Harris Bank [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 320,000	$ 320,000		$ 320,000	$ 340,000
Debt Instrument, Base Rate		8.00%	8.00%
BMO Harris Bank [Member] \| Revolving Credit Facility [Member] \| Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		3.50%
BMO Harris Bank [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument, Basis Spread on Variable Rate		1.00%
BMO Harris Bank [Member] \| Revolving Credit Facility [Member] \| Principal Balance Under 300 Million [Member]
Line of Credit Facility, Minimum Required Available Draw Amount					20,000
BMO Harris Bank [Member] \| Revolving Credit Facility [Member] \| Principal Balance At or Over 300 Million [Member]
Line of Credit Facility, Minimum Required Available Draw Amount					$ 50,000